package com.ck.framework.interceptor;

import com.alibaba.fastjson.JSON;
import com.ck.common.annotation.RepeatSubmit;
import com.ck.common.constant.AjaxResult;
import com.ck.common.utils.ip.ServletUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;

/**
 * @author ck
 * @date 2023/9/4 16:05
 * 防止重复提交拦截器
 */
@Component
public abstract class RepeatSubmitInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (handler instanceof HandlerMethod)
        {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            Method method = handlerMethod.getMethod();
            RepeatSubmit annotation = method.getAnnotation(RepeatSubmit.class);
            if (annotation!=null){
                if (this.isRepeatSubmit(request,annotation))
                {
                    AjaxResult ajaxResult = AjaxResult.error(annotation.message());
                    ServletUtils.renderString(response, JSON.toJSONString(ajaxResult));
                    return false;
                }
            }
            return true;
        }
        return true;
    }

    /**
     * 验证是否重复提交
     * @param request
     * @param annotation
     * @return
     */
    public abstract boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation);
}
